'Married At First Sight' baby erupts in tears in the arms of Karl Stefanovic on TODAY

It's not often there's tears on the TODAY set, but one special (tiny) guest couldn't hold it together on Tuesday morning.

Harper Rose -- the 14-month-old daughter of Married At First Sight sweethearts Zoe Hendrix and Alex Garner was happily lapping up her brekkie TV appearance when TODAY co-host and renowned baby whisperer, Karl Stefanovic, offered to look after the bub.

Image: Nine

Beelining over to the parents with his arms held wide open, the 43-year-old presenter scooped little Harper up from Hendrix, insisting that he was going to "babysit."

After Stefanovic sat back on the couch next to his new co-host Georgie Gardner, Harper instantly began to sob, and it quickly escalated into a loud, screaming wail.

Gardner, clearly sympathetic for a distraught baby Harper, instructed Stefanovic to "give her back". Which lead to the infant turning towards Gardner with a look of horror.

But Stefanovic didn't budge. Instead, he beamed at the camera with his thumbs up at the hilarity of it all. It wasn't long before Hendrix got up to collect her bawling daughter, who, after leaving Stefanovic's proximity, swiftly stopped crying. Meanwhile Gardner and Garner looked on in hysterics.

"If you want me to look after your kids, you can contact me on...," the presenter joked to the camera.

It's been three-and-a-half years since we met Hendrix and Garner on the first season of Nine's social experiment in 2015. They welcomed their daughter in November 2016.

Married at First Sight's Zoe and Alex embrace parenthood with adorable baby photos